Quick grow info:
I’m using mother earth 70/30 coco perlite mix, fertilizers b52, voodoo juice, and ph perfect sensi grow. Lighting is 14 inches from top and on 24/0
Problem:
One of 4 plants top leaves are making a wide curl downwards, no dead tips, but leaves slightly yellow (top ones)
Picture of the problem in question
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What strain is it and if it’s an auto-flower or photo plant. 4 possible problems are over watering, ph of water, tap water or underfed. @PreyBird1 and several others grow in coco so he can give you a better answer than I can.
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I got the seeds off a buddy he forgot what stair but believes ak47 auto or gurilla glue auto
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Also all the soil was from the same bag and ive used the same amount of ph perfect sensi grow, grow space did get a little cold though but it only dipped to 65
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That just seems really dryyy. But looks can be deceiving
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Try and give it some sleepy time.
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The below the surface is still very damp
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I asked if it was an auto because I have had auto’s start out looking like that. The yellowing leaves should turn green again in time. @TechDCo has good advice about sleepy time. Run your lights 18/6, just remember with auto’s anything like a light change will cause them to flower.
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Try rasing the pot put a brick underneath to help air flow. I think some sleepy time 18/6 will be ok to try.
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Ya right
Autos can be difficult with light ya nevwr know when they’ll flower. Photoperiods can be worse with light changes.
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Reason i decided 24/0 is my work schedule is chaotic and i dont have a autotimer on the lights
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can you grow outside in season? your schedule my not work for growing inside 
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